Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 261, Issue -, Pages 411-422Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2018.04.066
Keywords
Nanolubricant; Thermal conductivity; Rheology; Shear thinning; Thixotropy
Ask authors/readers for more resources
Nanolubricant is prepared by dispersing SiO2 nanoparticles into synthetic refrigerant compressor oil, polyalkylene glycol (PAG) using two-step method. Thermal conductivity and rheological properties of nanolubricant at various volume fractions (0.07 to 0.6vol %) in the temperature range 20 degrees C to 90 degrees C have been investigated. The results show that as the volume fraction increases thermal conductivity and viscosity increase. Conversely, the thermal conductivity and viscosity are found to be decreasing with increase in temperature. The highest thermal conductivity and viscosity of the nanolubricant(volume fraction 0.6%) are 1.31 and 10.34 times greater than that of pure lubricant. The measured thermal conductivity and viscosity are compared with that obtained from classical models and the classical models fail to predict these properties accurately. The nonnewtonian shear thinning behaviour of SiO2-PAG nanolubricant was confirmed by computing power law and consistency indices. At higher particle concentrations and lower temperatures, nanolubricant shows thixotropic behaviour. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available